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Old 01-15-2003, 05:14 PM
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Post Flexplate problems

I have a 1968 mustang that I am restoring. The C-4 transmission and engine has been out for some time now and I have finally put the rebuilt engine back in. I installed the original flexplate and transmission, and after starting it up about once a week for several months I turned it over and heard a grinding sound. Their were metal shavings coming from the flexplate so I replaced it thinking it was bent and not lining up well with the starter. It worked for a while and then it happened again. Not only shavings but the some of the welds on the flex plate were broken as well.
It looked like the problem was coming from the starter not lining up correctly because their was also damage on the starter, so I replaced it.
Nothing seems to help.
I don't know if it was something I missed during the installation since it had been apart for some time before putting it all back together again.
I did make sure that the flat metal plate was put in between the engine and the flexplate and that the washer was on the opposite side of the flexplate and torqued.I also made sure that the torque converter was torqued to spec to the flexpate.

What am I missing??

[ January 16, 2003: Message edited by: Va Stang ]</p>

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Old 01-17-2003, 05:26 AM
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I couldn't tell from your post if you used the original starter that you had with the previous engine. If not, maybe a problem with the starter gear and flexplate.

Did you match the new and old flexplate to ensure they were the same? Teeth count?

Or maybe a clearance problem. Those welds being damaged might indicate this.

Here is a <a href="http://a5.cpimg.com/image/D9/EE/15958745-d7c9-0200010E-.jpg" target="_blank">diagram</a> showing the proper clearances.

PS One other thing; Are you sure the tc is seated properly? I once missed the last notch and buttoned things up. Ended up tweaking the flexplate which caused it to rub. Had to replace it.

[ January 17, 2003: Message edited by: mstngjoe ]</p>
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Old 01-17-2003, 12:07 PM
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I never tried the original starter because it was in pretty bad shape. I also did not check to see if the gears in the new starter were any different. I am unable to compare the two because the old starter was used for the core charge on the new. The original flexplate and the replacement did have the same amount of teeth. However I am going to investigate some more on the welds that may have been rubbing.
Thanks for the diagram .
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